I can't get Windows XP to work on an external monitor

[destroyent]

I'm using a Dell Laptop with a DUAL BOOT system. I plugged my external monitor into it and Ubuntu shows up on the monitor and works fine, but when I tried booting with Windows XP nothing would show up on the monitor. Everything would show up on the laptop but not on the external monitor. Anyone know how I can fix this?

 

[destroyent]

I figured it out. My laptop was missing the Fn key and I needed that